Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Kabushiki Kaisha Tsuchiya

Akiyoshi Morita

Toshiharu Fukuizumi

Hideo Nonoyama

Mitsuyoshi Sato

Kiyokazu Uruno

Tsuchio Bunda

Yasuhisa Kaneko

Shinichiro Mizusawa

Tokiharu Fukuda

Kunio Shimizu

Yasuo Nemoto

Junichi Nagataki

Tamio Hayasaka

Ryoichi Okano

In a process for producing a surface remelted chilled layer camshaft by using a high density energy irradiation and self-cooling, a cam is rotated around the center axis of the camshaft and a position of a torch for the irradiation (e.g., a TIG arc torch) is controlled so as to form an angle between a tangential line of the cam surface and a horizontal line at a melting position in a lower side of the horizontal line in a direction opposite to the camshaft rotation direction being from 30.degree., preferably 20.degree., to zero degree.

Process for producing surface remelted chilled layer camshaft

This invention concerns an improvement in cast iron material and chilled iron material. The cast iron material has a C.E. value of not more than 4.3 in which cerium is added in the form of a mischmetal upon casting to a cerium content of from 0.005 to 0.035 wt %. The chilled cast iron article has a chilled layer formed by remelting at least a portion of the surface of the cast iron of a predetermined shape composed of the above-mentioned cast iron by a high density energy source such as tungsten inert gas (TIG) arc, laser or electron beam.

Cast iron making by cerium addition

A process for producing a camshaft with cams include the steps of forming a surface hardened layer in each of the cams by a remelting chilling treatment using high density energy (e.g., a TIG arc), characterized in that after the remelting chilling treatment, the camshaft is cooled by passing a cooling medium through a through hole formed longitudinally in the camshaft. As a result of the cooling, the neighboring untreated cam has a temperature of up to 250.degree. C. Elongation of the camshaft due to thermal expansion is so small that no melt-down end portion defects appear.

Process for producing camshaft with cams subjected to remelting chilling

A method of producing a cast iron camshaft including the steps of applying a high-density energy source, such as a TIG arc, a laser beam, and an electron beam over the entire sliding surface of a cam to melt the surface portion and cooling the cam by dissipating the localized heat through the camshaft itself so as to form a double structure hardened layer consisting of a chilled layer having a large amount of cementite and a hardened layer of martensite. This method omits the preheating of the camshaft prior to the high-density energy irradiation.

Method of producing a camshaft

A low-pressure screw in-line type injection molding method and apparatus for use with materials such as urea mixed resin powder are disclosed. The initial injection is performed at a converted injection pressure in the range of 250-700 Kg/cm.sup.2 and at an injection velocity in the range of 30-50 mm/sec. When the mold cavity has become nearly completely filled, the converted injection pressure is lowered to 50-200 Kg/cm.sup.2 for the completion of the injection cycle under low pressure conditions.

Screw in-line type injection molding method and apparatus for

A low-pressure screw in-line type injection molding method and apparatus for use with materials such as urea mixed resin powder are disclosed. The initial injection is performed at a converted injection pressure in the range of 250-700 Kg/cm.sup.2 and at an injection velocity in the range of 30-50 mm/sec. when the mold cavity has become nearly completely filled, the converted injection pressure is lowered to 50-200 Kg/cm.sup.2 for the completion of the injection cycle under low pressure conditions.

In pouring molten metal in a die casting device wherein a shot sleeve for supplying molten metal in a die cast mold is substantially horizontally arranged, a guide means for conducting molten flow is obliquely removably inserted into said shot sleeve through an opening provided at a top portion of said shot sleeve so as to guide a flow of molten metal directly into a molten holding space provided at a forward end portion of said shot sleeve.

Method of and a means for pouring molten metal in a die casting device

An exhaust gas purifier for internal combustion engine, has a porous filter impregnated with a desired adsorbent or a porous filter made of bulk metal catalyst. Instead of extending perpendicular to the main axial direction of the exhaust pipe, the filter extends axially and is mounted on a metal screen cylinder having a baffle which diverts the flow of exhaust gas toward and through the cylinder and filter. In this manner, the exhaust gas flows axially into the screen cylinder and then passes radially through the filter to a second flow passage which is connected to the purifier outlet. Very low back pressure is obtained with this arrangement.

Exhaust gas purifier for internal combustion engine

The present invention relates to heat insulating castings of triple structure consisting of heat and corrosion resistant metal, heat insulating refractory material, and cast metal. The invention is characterized in that heat and corrosion resistant metal sheet is covered with heat insulating refractory material and the thus formed assembly is enveloped with cast metal. Fringe areas are provided at the ends of the heat and corrosion resistant metal and these fringes are enveloped with cast metal.

Growing community of inventors

Toyota, Japan

Akiyoshi Morita